EP0145137A2 - Heizvorrichtung - Google Patents

Heizvorrichtung Download PDF

Info

Publication number
EP0145137A2
EP0145137A2 EP84306216A EP84306216A EP0145137A2 EP 0145137 A2 EP0145137 A2 EP 0145137A2 EP 84306216 A EP84306216 A EP 84306216A EP 84306216 A EP84306216 A EP 84306216A EP 0145137 A2 EP0145137 A2 EP 0145137A2
Authority
EP
European Patent Office
Prior art keywords
cavity
fluid
pipe
open end
heating apparatus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP84306216A
Other languages
English (en)
French (fr)
Other versions
EP0145137A3 (en
EP0145137B1 (de
Inventor
Wei Hsiung Yen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yen Wei Hsiung
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT84306216T priority Critical patent/ATE37821T1/de
Publication of EP0145137A2 publication Critical patent/EP0145137A2/de
Publication of EP0145137A3 publication Critical patent/EP0145137A3/en
Application granted granted Critical
Publication of EP0145137B1 publication Critical patent/EP0145137B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • B29C33/04—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
    • B29B13/023—Half-products, e.g. films, plates
    • B29B13/024—Hollow bodies, e.g. tubes or profiles
    • B29B13/025—Tube ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid

Definitions

  • This invention relates to apparatus for heating plastic pipes, tubes or the like whereby the plastic is heated sufficiently to become malleable for moulding purposes.
  • An alternative method for heating plastic pipes and tubes involves introducing the part to be moulded into a hot air chamber. This method reduces the handling difficulties associated with dipping pipes or tubes into a hot fluid bath, although the use of a hot air chamber results in high energy consumption and furthermore the pipe is only heated up relatively slowly and the system is therefore time consuming.
  • the invention is characterised in that the heating apparatus comprises a body portion which defines an annular cavity adapted to receive a part of a pipe or the like, the cavity being communicable with a source of hot fluid whereby in use fluid is caused to flow through the cavity in intimate contact with the pipe so as to heat said part of the pipe or the like, disposed therein.
  • fluid is caused to flow through the cavity in intimate contact with the pipe is advantageous in that a relatively small quantity of fluid may be recirculated through the cavity and the size of the fluid source or reservoir may be minimised with resulting energy saving.
  • a bath of fluid in which the pipe is immersed is not required, and the handling difficulties encountered heretofore do not arise.
  • the fluid used in accordance with the invention will normally be a liquid such as oil.
  • the manner in which the cavity is communicable with a source of hot fluid is such that in use the fluid is quickly and evenly distributed along its length such that rapid and even heating of the pipe is achieved.
  • the body portion includes fluid flow passages which communicate with both the inner and outer walls of the cavity at spaced intervals along its length and which are coupledble to one or more hot fluid inlet lines of the apparatus. Hot fluid pumped into the apparatus via such flow passages thus impinges on both the inner and outer surfaces of the part of a pipe disposed within the cavity.
  • One or more fluid outlet openings may be provided from the cavity, and as mentioned above if desired the hot fluid may be continuously recirculated to and from the apparatus from a suitable reservior such that energy consumption is minimised.
  • a preferred embodiment of the invention is adapted to heat the end portion of a pipe or tube, and one end of the cavity is therefore closed.
  • Fluid outlet openings may conveniently be formed adjacent the closed end of the cavity such that in use the hot fluid flows in a direction away from the open end of the cavity.
  • sealing means adjacent the open end of the cavity are required to prevent the hot fluid escaping and contacting parts of the pipe outside the cavity.
  • Resilient mechanical seals adapted for sealing engagement with the inner and outer surfaces of the pipe might conceivably be provided.
  • compressed air is forced into the cavity via openings in its inner and outer walls adjacent its open end. This prevents oil escaping and has the advantage that adequate sealing may be achieved with pipes and tubes of varying thicknesses, e.g. caused by tolerances.
  • the compresed air is effective to force residual fluid within the cavity back via the outlet apertures to the reservoir.
  • the body portion may be constructed in any convenient manner, although in a preferred embodiment it comprises inner and outer parts defining there between the annular cavity and each including flow passages for the transfer of hot fluid to the cavity.
  • the inner part may conveniently be divided into a number of segments which are longitudinally spaced so as to define there between radial flow passages extending between a longitudinally extending inlet passage and the annular cavity.
  • the invention also provides a method of heating a plastic tube, pipe or the like including introducing the part thereof to be heated into an annular cavity and passing hot fluid through said cavity in intimate contact with said part of the pipe disposed therein.
  • apparatus for heating a plastic pipe, tube or the like comprises a body portion including an inner part 1 and a cylindrical outer part 2 which define there between an annular cavity 3.
  • the cavity 3 is closed at one end by means of a flange 4, the flange 4 being recessed at a number points around its perphery to define outlet openings 5.
  • the inner part 1 comprises a plurality of segments 6 which are spaced apart so as to define longitudinally spaced lateral flow passes 7 there between which communicate with the inner surface of the annular cavity 3 and with a longitudinal flow passage 8 such that hot fluid from a suitable reservoir may be supplied to the cavity 3 from a first inlet 9.
  • the outer, cylindrical part 2 includes an annular flow passage 10 which communicates via lateral flow passages 11 with the outer wall of the cavity 3 such that hot fluid may be supplied to the cavity from a second inlet 12.
  • annular passages 13, 14 which communicate with the cavity 3 via a plurality of radial ports 15 such that compressed air may be supplied to the front of the cavity from inlet lines 16.
  • the end portion of a pipe 18 is introduced into the cavity, and compressed air is supplied to the lines 16.
  • locating elements 17 may be provided to ensure that the pipe is correctly seated.
  • Hot liquid, in the form of oil, is then pumped into the cavity 3 via inlets 9 and 12, the oil being evenly distributed around the inner and outer surfaces of the pipe by virtue of the spaced flow passages 7, 11, and flowing leftwardly through the cavity as shown in Figure 1 to the outlet apertures 5 from where it may be recirculated to a reservoir.
  • the compressed air supplied to the radial ports 15 is effective to prevent oil flowing rightwardly from the apparatus.
  • the oil supply to the inlets 9, 12 is shut off, and the pipe is removed from the apparatus.
  • the compressed air supply is maintained during and after removal of the pipe such that any residual oil is forced out of the cavity via the outlet openings 5, and oil is also prevented from dripping out of the passages 7 and 11.
  • Two such devices may be used in tandem, whereby a pipe heated by a first device is moulded while another pipe is heating in the second device; thus, moulding may be carried out continuously of pipes heated by the alternate devices.
  • terminal portions of the flow passages 7 and 11 are arranged to point leftwardly as seen in Figure 1, so as to assist the fluid flow through the cavity in a direction towards the closure flange 4 in which outlet openings 5 are formed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Pipe Accessories (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • General Preparation And Processing Of Foods (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Resistance Heating (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
EP84306216A 1983-09-12 1984-09-11 Heizvorrichtung Expired EP0145137B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84306216T ATE37821T1 (de) 1983-09-12 1984-09-11 Heizvorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB08324359A GB2146571B (en) 1983-09-12 1983-09-12 Apparatus for heating the end of a plastic pipe
GB8324359 1983-09-12

Publications (3)

Publication Number Publication Date
EP0145137A2 true EP0145137A2 (de) 1985-06-19
EP0145137A3 EP0145137A3 (en) 1985-09-25
EP0145137B1 EP0145137B1 (de) 1988-10-12

Family

ID=10548648

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84306216A Expired EP0145137B1 (de) 1983-09-12 1984-09-11 Heizvorrichtung

Country Status (7)

Country Link
US (1) US4580972A (de)
EP (1) EP0145137B1 (de)
AT (1) ATE37821T1 (de)
AU (1) AU578425B2 (de)
CA (1) CA1220315A (de)
DE (1) DE3474529D1 (de)
GB (1) GB2146571B (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU592513B2 (en) * 1986-06-18 1990-01-11 Elektro-Thermit Gmbh Process for welding a railway rail, aluminothermic heating blocks for use in the process, and method of making said aluminothermic heating blocks
DE3717712A1 (de) * 1987-05-26 1988-12-15 Leybold Ag Vorrichtung zur halterung von werkstuecken
DE3739906A1 (de) * 1987-11-25 1989-06-08 Philips Patentverwaltung Vorrichtung aus quarzglas
JPH0322710Y2 (de) * 1988-05-26 1991-05-17
US4856989A (en) * 1988-07-25 1989-08-15 Uly-Pak, Inc. Preheater for heat-sealing system for plastic containers
US4961805A (en) * 1988-07-25 1990-10-09 Com-Pac International, Inc. A method for severing and sealing sections of material

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2536100A1 (de) * 1975-08-13 1977-02-17 Gerd Arweiler Verfahren und vorrichtung zum erwaermen oder abkuehlen des endbereichs eines aufzumuffenden kunststoffrohres
DE2536306A1 (de) * 1975-08-14 1977-02-24 Thyssen Plastik Anger Kg Anwaermofen mit infrarotheizung
GB1499393A (en) * 1974-03-25 1978-02-01 Wavin Bv Heating an end part of a synthetic tube
US4204823A (en) * 1978-05-03 1980-05-27 Hayes Fay A Inplace gasket belling machine

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1117401A (en) * 1913-12-06 1914-11-17 Silas Klone Tire-heater.
GB651097A (en) * 1948-10-30 1951-03-14 Dunlop Rubber Co Improvements in or relating to the manufacture of corrugated rubber hose
BE523287A (de) * 1952-10-21
US3085290A (en) * 1959-12-09 1963-04-16 Resistoflex Corp Method and apparatus for producing large diameter thin wall tubing of polytetrafluoroethylene
GB987724A (en) * 1963-04-03 1965-03-31 Ward Goldstone Ltd Improvements in or relating to the manufacture of lampshades
US3186698A (en) * 1963-06-14 1965-06-01 Midland Ross Corp Heat treating apparatus
BE634499A (de) * 1963-07-29
GB1218548A (en) * 1967-05-09 1971-01-06 Tenaplas Ltd Improvements in or relating to heating devices for thermoplastic pipes
GB1210950A (en) * 1967-06-30 1970-11-04 Joenkoeping Vulcan Ab Compression moulding apparatus
DE2010345A1 (de) * 1970-03-05 1972-01-20 Demag Ag Vorrichtung zum Innen und Außenkuhlen sowie Innen und Außenkalibrieren von extru dierten Hohlprofilen, insbesondere Kunststoff rohren
US4203721A (en) * 1978-05-03 1980-05-20 Hayes Fay A Method of heating plastic pipe
US4437453A (en) * 1982-12-27 1984-03-20 Temple Eugene A Plastic pipe heater

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1499393A (en) * 1974-03-25 1978-02-01 Wavin Bv Heating an end part of a synthetic tube
DE2536100A1 (de) * 1975-08-13 1977-02-17 Gerd Arweiler Verfahren und vorrichtung zum erwaermen oder abkuehlen des endbereichs eines aufzumuffenden kunststoffrohres
DE2536306A1 (de) * 1975-08-14 1977-02-24 Thyssen Plastik Anger Kg Anwaermofen mit infrarotheizung
US4204823A (en) * 1978-05-03 1980-05-27 Hayes Fay A Inplace gasket belling machine

Also Published As

Publication number Publication date
CA1220315A (en) 1987-04-14
ATE37821T1 (de) 1988-10-15
US4580972A (en) 1986-04-08
GB8324359D0 (en) 1983-10-12
AU3293384A (en) 1985-03-21
GB2146571B (en) 1987-12-23
EP0145137A3 (en) 1985-09-25
EP0145137B1 (de) 1988-10-12
GB2146571A (en) 1985-04-24
DE3474529D1 (en) 1988-11-17
AU578425B2 (en) 1988-10-27

Similar Documents

Publication Publication Date Title
US2745640A (en) Heat exchanging apparatus
EP0145137A2 (de) Heizvorrichtung
JP2001518016A (ja) 断続した加熱ゾーンを使用した形成技術
US2320564A (en) Method and apparatus for manufacturing tubing
EP0028450B1 (de) Herstellung thermoplastischer Rohre
IT1136636B (it) Piastra forata per scambiatori di calore a tubi di circolazione di fluido
ATE14926T1 (de) Plattenfoermiger waermetauscher.
GEP20012541B (en) Method for Heating or Cooling Solid Material with Low Heat Conduction and a Reactor
US5762341A (en) O-ring insert
ES344688A1 (es) Un metodo para fabricar un conjunto de clavija de arnes.
CN212400343U (zh) 一种小口径厚壁热缩管扩张模具及其扩张系统
US3263314A (en) Fixture for and method of assembling heat exchanger core
CN212567020U (zh) 一种用于热媒油系统的控温管道
US3268703A (en) Brazing tool
KR970011560B1 (ko) 가황 장치
US2887722A (en) Fluid heat exchange apparatus for use in molds
US4687432A (en) Apparatus for forming plastic pipe couplings
CN215791901U (zh) 一种用于轮胎硫化的单胎硫化模具
IE922072A1 (en) A lining method and apparatus
JPS5850188B2 (ja) ゴム又はプラスチツク成形品の連続押出加硫装置
US20200392638A1 (en) Facility and method for localized surface treatment for industrial components
JPS5764514A (en) Lining of pipe surface and lined pipe
CN2137370Y (zh) 台式重氮复印机的滴氨显影装置
RU1828985C (ru) Способ нанесени износостойкости покрыти на внутреннюю поверхность трубы
KR970063473A (ko) 반도체설비용 온도조절장치 및 반도체 가공설비

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19860221

17Q First examination report despatched

Effective date: 19860922

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: YEN, WEI HSIUNG

RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: YEN, WEI HSIUNG

RBV Designated contracting states (corrected)

Designated state(s): AT BE CH DE FR IT LI LU NL SE

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19881012

Ref country code: LI

Effective date: 19881012

Ref country code: CH

Effective date: 19881012

Ref country code: AT

Effective date: 19881012

REF Corresponds to:

Ref document number: 37821

Country of ref document: AT

Date of ref document: 19881015

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3474529

Country of ref document: DE

Date of ref document: 19881117

ITF It: translation for a ep patent filed

Owner name: SOCIETA' ITALIANA BREVETTI S.P.A.

ET Fr: translation filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19890930

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19920918

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19920923

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19920930

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19921013

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19930930

BERE Be: lapsed

Owner name: YEN WEI HSIUNG

Effective date: 19930930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19940401

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19940531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19940601

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST